Strong temporal variation of consumer delta C-13 value in an oligotrophic reservoir is related to water level fluctuation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F23%3A43906245" target="_blank" >RIV/60076658:12520/23:43906245 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s41598-023-30849-9" target="_blank" >https://doi.org/10.1038/s41598-023-30849-9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41598-023-30849-9" target="_blank" >10.1038/s41598-023-30849-9</a>
Alternative languages
Result language
angličtina
Original language name
Strong temporal variation of consumer delta C-13 value in an oligotrophic reservoir is related to water level fluctuation
Original language description
Using stable carbon and nitrogen isotope analysis (delta C-13 and delta N-15) to assess trophic interactions in freshwater ecosystems is a well established method, providing insight into ecosystem functioning. However, the spatial and temporal variability of isotope values, driven by environmental fluctuation is poorly understood and can complicate interpretations. We investigated how the temporal variation of stable isotopes in consumers (fish, crayfish and macrozoobenthos) of a canyon-shaped oligotrophic reservoir is associated with environmental factors such as water temperature, transparency, flooded area, and water quality measures. Consumers and their putative food sources were sampled and analyzed for carbon and nitrogen stable isotopes annually, and environmental parameters were measured monthly from 2014 to 2016. Results revealed significant differences in delta C-13 and delta N-15 values in each consumer among studied years. Over the years, fish and crayfish expressed differences in delta C-13 between 3 and 5 parts per thousand, whereas in zoobenthos differences were 12 parts per thousand. Variability in delta N-15 was similar across all consumers (2-4 parts per thousand). Moreover, results suggest that the flooded area of the reservoir was a major driver of delta C-13 stable isotope values variation in consumers, while variation in delta N-15 was not linked to any of the studied environmental factors. Bayesian mixing models further showed significant changes in the origin of detritivorous zoobenthos carbon sources (reversal shift from terrestrial detritus to algae origin) between years with low water level to years with the standard water level. Other species showed only slight differences in food source utilization among years. Our study highlights the importance of environmental factors as sources of variation in consumer's stable isotope values which should be considered especially when studied ecosystem strongly fluctuate in some environmental factor.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10618 - Ecology
Result continuities
Project
<a href="/en/project/LO1205" target="_blank" >LO1205: Sustainability and Excellence of the Centre of Aquaculture and Biodiversity of Hydrocenoses</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Scientific Reports
ISSN
2045-2322
e-ISSN
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Volume of the periodical
13
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
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UT code for WoS article
000946670000021
EID of the result in the Scopus database
2-s2.0-85149574152